” Women should get a mammogram every two years starting at age 50 ” and while routine screening brings little benefit in the 40s, beginning it that early should be a personal choice, a U.S. government task force said Monday. Also, there’s not enough evidence to tell if new 3-D mammograms are the best option for routine screening, or if women with dense breasts need extra testing to find hidden tumors, the U.S. Preventive Services Task Force concluded.